Results 11 to 20 of about 1,746,770 (313)
Group delay variations of GPS transmitting and receiving antennas
Journal of Geodesy, 2017 GPS code pseudorange measurements exhibit group delay variations at the transmitting and the receiving antenna. We calibrated C1 and P2 delay variations with respect to dual-frequency carrier phase observations and obtained nadir-dependent corrections ...
L. Wanninger, Hael Sumaya, S. Beer
semanticscholar +1 more source
Solar-Terrestrial Physics, 2019 When developing the first topside ionosphere sounding stations, the issue was debated concerning the improvement of the electromagnetic compatibility of such devices through the use of chirp signals.
Podlesnyi A.V. +2 more
doaj +1 more source
Communication Modes With Large Intelligent Surfaces in the Near Field
IEEE Access, 2021 This paper proposes a practical method for the definition of communication modes when antennas operate in the near-field region, by realizing ad-hoc beams exploiting the focusing capability of large antennas. The beamspace modeling proposed to define the
Nicolo Decarli, Davide Dardari
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Computer Communications, 2019 Due to the hierarchical structure and heterogeneity of most deployed wireless networks, multiple data transmissions using the same communication resource, such as same frequency band and time slot, are likely to occur in the same area.
Z. Li +4 more
semanticscholar +1 more source
Design of large aperture sparse array for mainlobe interference cancellation
The Journal of Engineering, 2019 Large aperture sparse array has the ability of mainlobe interference suppression. However, sparse array causes grating lobe problem. If the array is steering at the target and the mainlobe interference is located at the grating lobe, the adaptive filter ...
Honggang Zhang +3 more
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Two‐dimensional transmit arrays for polar over‐the‐horizon radar
IET Radar, Sonar & Navigation, 2021 Two‐dimensional (2‐D) transmit arrays offer many advantages over traditional over‐the‐horizon radar (OTHR) arrays, including the capability to steer and mitigate auroral clutter, a clutter type prevalent in polar operation, in all azimuth and elevation ...
Simon Henault, Ryan J. Riddolls
doaj +1 more source
Frontiers in Communications and Networks, 2021 A short-range terahertz (THz) wireless transmission in the 300 GHz band is demonstrated using low-profile wavelength-scaled dielectric transmitting and receiving cuboid antennas (DCAs). These dielectric cuboid antennas are made of polytetrafluoroethylene
Kazuki Yamada +7 more
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New Journal of Physics, 2012 We show that the public experiment held in Venice by Tamburini et al and reported in 2012 New J. Phys. 14 033001 can be regarded as a particular implementation of multiple-input–multiple-output (MIMO) communications and, therefore, has no advantages over
Michele Tamagnone +2 more
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Applied Sciences, 2019 This paper presents a practical method of receiving waves having orbital angular momentum (OAM) in the far field of an antenna transmitting multiple OAM modes, each carrying a separate data stream at the same radio frequency (RF).
Marek Klemes
doaj +1 more source
MIMO Signal Multiplexing and Detection Based on Compressive Sensing and Deep Learning
IEEE Access, 2019 We propose a novel signal multiplexing and detection method for multiple-input multiple-output (MIMO) communication systems, especially when the number of transmitting and receiving antennas is limited.
Chanzi Liu +3 more
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